(Combination of Q.5/16 and Q.8/16)

Background

This study includes the work on HDLC-based protocols for both modem-based communication, i.e. V.42 and V.75, and ISDN-based communication, i.e. V.120. Additionally data compression on top of these protocols is addressed. Continued study is necessary on issues arising from new applications.

Items for study

Terminal adapters (TAs) for devices having V-series interfaces to provide for their use on ISDN bearer services. This will include their use on:

1) multi-use bearer service; and

2) other bearer services.

Protocols between DCEs for applications such as:

1) half-duplex operation;

2) statistical multiplexing;

3) secure access and privacy of data;

4) compression of synchronous data;

5) improved data compression algorithms;

6) changes to existing V-series Recommendations;

7) management of remote DCEs.

It shall also include procedures to ensure reliable interworking between DTEs on the PSTN using modems and:

1) DTEs on non-ISDN digital networks;

2) DTEs on ISDNs using:

a) TAs with modems on 3.1 kHz audio bearers;

b) TAs for adaptation to digital bearers;

c) TAs for use on multi-use bearer services.

Specific tasks

Develop new Recommendations and update existing Recommendations.

Relationships

• ITU-T Study Group 2 on services.
• ITU-T Study Group 8 on fax.
• ITU-T Study Group 11 on network signalling systems.
• ITU-T Study Group 13 on ISDN.
• ISO/IEC JTC 1/SC 6 on the compression of synchronous data.
• Other questions of SG 16 on the Mediacom 2004 Project.